Recorders – Record receiver deforming
Patent
1988-03-28
1989-08-15
Arnold, Bruce Y.
Recorders
Record receiver deforming
350255, 346108, G02B 702
Patent
active
048568708
ABSTRACT:
An improved laser module is disclosed wherein a solid state laser is mounted on a laser holder and a lens system is mounted in a lens holder. The lens holder is movable with respect to the laser holder and is provided with a cylindrical part having a first screwthread. To achieve precise focussing of the laser, the laser holder is provided with a cylindrical recess wherein a second screwthread is provided. A cam and groove assembly is also provided in the lens holder and laser holder to prevent rotation of the lens holder. A rotatable intermediate ring is disposed between the first and second screwthreads when viewed radially. This rotatable intermediate ring is provided with an internal screwthread in engagement with the first screwthread and with an external screwthread in engagement with the second screwthread. The pitch of the internal screwthread is slightly different from the pitch of the external screwthread which enables the lens holder to be adjusted more precisely.
REFERENCES:
patent: 2532300 (1950-12-01), Harvey
patent: 3915557 (1975-10-01), Shimojima
patent: 4297713 (1981-10-01), Ichikawa
patent: 4431267 (1984-02-01), Finck et al.
Arnold Bruce Y.
Ben Loha
Oce'-Nederland, B.V.
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